feat: Updated remote config to include domain restrictions (#26875)

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

posthog/api/decide.py

@@ -14,8 +14,7 @@
 from posthog.api.utils import (
     get_project_id,
     get_token,
-    hostname_in_allowed_url_list,
-    parse_domain,
+    on_permitted_recording_domain,
 )
 from posthog.database_healthcheck import DATABASE_FOR_FLAG_MATCHING
 from posthog.exceptions import (
@@ -47,24 +46,6 @@
 )
 
 
-def on_permitted_recording_domain(team: Team, request: HttpRequest) -> bool:
-    origin = parse_domain(request.headers.get("Origin"))
-    referer = parse_domain(request.headers.get("Referer"))
-    user_agent = request.META.get("HTTP_USER_AGENT")
-
-    is_authorized_web_client: bool = hostname_in_allowed_url_list(
-        team.recording_domains, origin
-    ) or hostname_in_allowed_url_list(team.recording_domains, referer)
-    # TODO this is a short term fix for beta testers
-    # TODO we will match on the app identifier in the origin instead and allow users to auth those
-    is_authorized_mobile_client: bool = user_agent is not None and any(
-        keyword in user_agent
-        for keyword in ["posthog-android", "posthog-ios", "posthog-react-native", "posthog-flutter"]
-    )
-
-    return is_authorized_web_client or is_authorized_mobile_client
-
-
 def get_base_config(token: str, team: Team, request: HttpRequest, skip_db: bool = False) -> dict:
     # Check for query param "use_remote_config"
     use_remote_config = request.GET.get("use_remote_config") == "true" or token in (
@@ -361,7 +342,7 @@ def get_decide(request: HttpRequest):
 
 
 def _session_recording_domain_not_allowed(team: Team, request: HttpRequest) -> bool:
-    return team.recording_domains and not on_permitted_recording_domain(team, request)
+    return team.recording_domains and not on_permitted_recording_domain(team.recording_domains, request)
 
 
 def _session_recording_config_response(request: HttpRequest, team: Team) -> bool | dict:

posthog/api/remote_config.py

@@ -5,6 +5,14 @@
 from posthog.models.remote_config import RemoteConfig
 
 
+def add_vary_headers(response):
+    """
+    Add Vary headers for Origin and Referer to responses.
+    """
+    response["Vary"] = "Origin, Referer"
+    return response
+
+
 class BaseRemoteConfigAPIView(APIView):
     """
     Base class for RemoteConfig API views.
@@ -23,28 +31,28 @@ def check_token(self, token: str):
 class RemoteConfigAPIView(BaseRemoteConfigAPIView):
     def get(self, request, token: str, *args, **kwargs):
         try:
-            resource = RemoteConfig.get_config_via_token(self.check_token(token))
+            resource = RemoteConfig.get_config_via_token(self.check_token(token), request=request)
         except RemoteConfig.DoesNotExist:
             raise Http404()
 
-        return JsonResponse(resource)
+        return add_vary_headers(JsonResponse(resource))
 
 
 class RemoteConfigJSAPIView(BaseRemoteConfigAPIView):
     def get(self, request, token: str, *args, **kwargs):
         try:
-            script_content = RemoteConfig.get_config_js_via_token(self.check_token(token))
+            script_content = RemoteConfig.get_config_js_via_token(self.check_token(token), request=request)
         except RemoteConfig.DoesNotExist:
             raise Http404()
 
-        return HttpResponse(script_content, content_type="application/javascript")
+        return add_vary_headers(HttpResponse(script_content, content_type="application/javascript"))
 
 
 class RemoteConfigArrayJSAPIView(BaseRemoteConfigAPIView):
     def get(self, request, token: str, *args, **kwargs):
         try:
-            script_content = RemoteConfig.get_array_js_via_token(self.check_token(token))
+            script_content = RemoteConfig.get_array_js_via_token(self.check_token(token), request=request)
         except RemoteConfig.DoesNotExist:
             raise Http404()
 
-        return HttpResponse(script_content, content_type="application/javascript")
+        return add_vary_headers(HttpResponse(script_content, content_type="application/javascript"))